Whopping 540MB, so more for later 'old' PC's (with perhaps 1GB or more RAM). Download, burn to CD/DVD, reboot from CD/DVD and a viable alternative to Windows XP IMO with less of a steep learning curve to transition to puppy linux (OpenOffice is more like Windows Office than is Libre Office).
Italian language version added (Slack-it_570.iso) by xanad
*** slacko5.7-2015.iso by 8Gee remade for the eeepc see http://www.murga-linux.com/puppy/viewtopic.php?t=97110 ***
*** slack57-2015fd.iso also by 8Geee, see here for details: http://www.murga-linux.com/puppy/viewtopic.php?t=95554&start=15 ***
*** slackoff by ttuuxxx, details here: http://www.murga-linux.com/puppy/viewtopic.php?t=97211